Thread: How to print directly from compile screen?

You mean with sprintf() or something?

Code:

char command[BUFSIZ];
sprintf(command, "print \"%s\\%s\"", "C:\\", "text.txt");
system(command);

Can you be more specific?

In case tabstop wasn't clear: only the printf() and scanf() family of functions uses format specifiers like %s and %d. All other standard C functions generally just take single strings. If you need to use strings with format specifiers with other functions, you can use sprintf() first to create a single string from your printf-style arguments.

Originally Posted by mcotter222

All I did was add this line to the end

Code:

remove("C:\\Documents and Settings\\USERNAME\\Desktop\\Test.txt");

and nothing happened when I compiled it besides making the file Test.txt.

It should definitely work - remove does return an error code, so perhaps something like this:

Code:

if (remove(...) != 0)
{
    perror("Remove(...):");  // This will show an error such as "file not found" or such things
    exit(1);   // May not be the right thing.
}

Also, bear in mind the above comments on filenames and 8.3 format if you are using for example Turbo C to make a DOS executable (although this should apply to when you are creating the file too).

--
Mats

As far as I'm aware, perror() automatically adds a colon to the message.

Code:

$ cat ./perror.c
#include <stdio.h>

int main() {
    perror("");
    perror("function");
    perror("function:");
    return 0;
}
$ ./perror
Success
function: Illegal seek
function:: Illegal seek
$

(I guess perror() must also set errno to whatever corresponds to illegal seeks on my system, too.)

So the best way to use perror is something like this:

Code:

perror("remove");
perror("remove()");
perror(filename);
fprintf(stderr, "remove(): %s: ", filename), perror("");

Okay, I tried fclose, but that didn't hep. Here's what I have:

Code:

#include <stdio.h>
#include <stdlib.h>

int main()
{
  FILE *flpt;
  flpt = fopen("C:\\Documents and Settings\\alpha\\Desktop\\Test.txt", "w");
  fprintf(flpt, "Test print.\n\nTest print.\n\nTest print.\n\n");
  fclose(flpt);
  system("PRINT /D:LPT1 \"C:\\Documents and Settings\\alpha\\Desktop\\Test.txt\"");
}

I'm pretty sure this only works for "DOS compatible printers" - I just tried on my machine, and it queued the print job, but it's not printing to my default printer, but the one on LPT1:, which is no longer available on my machine.

--
Mats